Mercedes Climate Control Unit (CCU) hidden menus and functions
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- čas přidán 8. 09. 2024
- Sensor number - Sensor information - Special Notes
If a sensor's readout is OP E, that means open circuit
If a sensor's readout is CL O, that means short circuit
01 - Inside temperature - B10/4
02 - Outside temperature - B14
03 - Left heater core temperature - B10/1
04 - Right heater core temperature - Dual-zone climate control only
05 - Evaporator temperature - B10/6
06 - Engine coolant temperature - B11/4
07 - A/C high-side pressure - Measurement is in bar, e.g. 06°4 = 6.4 bar
08 - Refrigerant temperature - B12/1
09 - NOT ASSIGNED
10 - Blower motor control voltage - from 0.8 to 6.0 volts
20 - Auxiliary fan control current
21 - Engine RPM - value x 100
22 - Vehicle speed
23 - Terminal 58d voltage - shown as % of battery voltage
40 - Software status
41 - Software status
42 - Version code - Use this number to check your car's current CCU version code
43 - Version code - bEn = gasoline, dIe = diesel
50, 51, 52 - NOT ASSIGNED
54 - A/C compressor EMERGENCY OFF signal from engine control module
Climate Control Unit diagnostic code - Information
026 - CAN communication
226 - Interior temperature sensor B10/4
227 - Outside temperature sensor B14
228 - Heater core temperature sensor B10/1
230 - Evaporator temperature sensor B10/6
231 - Engine coolant temperature sensor B11/4
232 - Refrigerant pressure sensor B12
233 - Refrigerant temperature sensor B12/1
241 - Refrigerant level
416 - Auxiliary coolant pump A31m1
417 - Left Duovalve Y21
418 - Right Duovalve Y21
419 - A/C compressor electromagnetic clutch
420 - Idle speed controller
421 - Pulse module for electric fan(s) N65
422 - Serial interface K1
**** Flap malfunction section, some flaps have 2 positions (short stroke and long stroke) ****
451 - Center outlet diverter flap
452 - Center outlet blend flap
453 - Recirculate long stroke
454 - Recirculate short stroke
455 - Windshield defrost flap long stroke
456 - Windshield defrost flap short stroke
457 - footwell flap long stroke
458 - footwell flap short stroke
**** End section ****
459 - Serial interface K2
462 - Diesel engine only, wide open throttle signal
VERSION CODING
00P - Serial interface K1
02P - Serial interface K1 and K2
08P - Serial interface K1, refrigerant level check OFF
10P - Serial interface K1 and K2, refrigerant level check OFF
18P - Serial interface K1 and K2, engine/climate control electric cooling fan
32P - Serial interface K1 and K2, auxiliary cooling fan not available
Concise,informative,and a big help for me. I'm working on my first Benz- a C220 1995 model.
Very good information.
Thanks a lot
Great video this helped me with my ac in my w202 c280 Sport.
Very helpful thank you.
Is that possible to change the display from °F to °C vice versa? Thanks for the video.
Hey is there a way to reset the flaps, I believe some of mine are stuck and or malfunctioning
6:08 good tip for people with dual zone. Great video brother
Sweet dude thanks a lot and now blows call there
How do I set the outside or inside temperature to the climate control panel?
you don't
I have a 99 SL500 do you know where I can find the codes/instructions for it?
Thanks in advance for any assistance you can provide!!
Which codes are you looking for?
I have a 99 SL500 too, AC not working so would like to know too
Does anybody know what version code you are suppose to have related to year and model? And does it have anything to do with the software status code?
Well basically, if you read the description, you'll see all the possible version codes to use. You have to figure out what equipment corresponds to your car. Pre-facelift all uses 00P because there is no K2 serial interface on pre-facelift cars. 08P should only be used for diagnostic reasons on pre-facelift (same for 10P on facelifted cars). If you have a facelift, you'll either use 02P if you have a fan clutch, or 18P if you have an electric engine cooling fan. 32P would be for fan clutch without aux fans (I've never seen a car with just the mechanical fan). I'm guessing it's used as a temporary mode if the aux fans / fan controller are broken. The engine can get quite hot if you are idling with the AC on and without aux fans.
Hello, i have a Mercedes W202 C200 1999 automatic transmission , i have A/C issue with, when the A/C is on it is hot,
not blowing cool , if someone know how to fix please guide me. thank you.
Get an A/C technician to diagnose and fix your car, it's the quickest and cheapest way to get it fixed.
@@PatsCarGarage Thank you.
do you know how to change from Fahrenheit to celsius?
Thanks for the great video, I have a C280 withe same AC control, my center dash vents does not open, is there a code for that within the control unit? Thx
Scroll through the video's description, all the codes are there. I've also got a video on how to address vents not working (it's a big job, but totally possible to turn it around in a weekend if you have a garage)
@@PatsCarGarage thanks for video. my car is w202 1996 model. My car's climate control unit is the same as yours. I have a problem. always the same fan parts are blowing in the car. center console fan not blowing. step control does not work. it always blows the same way.
@@yavuzsanane2077 you should vacuum test the actuators make sure they aren't leaking
Hello everyone, I replace the condensor,compressor,canister and expansion valve , i pull out vacuum for 30 min and add (12oz ) about i can of r134 freon with the engine off, now I start the car and the control does not move from 72 degrees so the compressor does not engage to recharge any idea how to fix/reset the temperature control?
Thank you
One can of r134a is not enough. I don't know which model you have but Mercedes of this vintage typically require 2 cans (sometimes a little bit more). With that being said, even with 1 can, the compressor should start, I suggest you follow the procedure from my video and find what the error codes are.
Did you switch the positions of the radio and climate control? That's neat though
I had to when I put the Continental radio in, the upper slow has a separate plastic frame that can be modified to fit the frame the Continental radio comes with. This gives it a tight fit and allows the Continental specific radio keys to work (so you can't bust in, yank the radio out and leave with it).
@@PatsCarGarage what radio was it?
@@PatsCarGarage is there a way to reset flap function
@@sincerity7 Continental TR7412UB-OR. I've got a review on my channel.
@@sincerity7 No, if your flaps are malfunctioning, you need to replace them. I have a video on my channel for that too.
how to check which version code i have? what 42 shows?
watch the video
Good video but I prefer not to play with these codes it's not easy to set it up again
You should be fine as long as you are careful with the version coding menu, for the 2 other menus, there isn't anything you can do which will break something.
I MEAN THE Climate control I think needs to be reset
00P what is this?
Look in the video's description, I have a breakdown of everything.
hello i ask you your phone number joke